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cacti/lib/snmp.php
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<?php
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2004-2011 The Cacti Group |
| Portions Copyright (C) 2010 Boris Lytochkin, Sponsored by Yandex LLC |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2 |
| of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
+-------------------------------------------------------------------------+
| Cacti: The Complete RRDTool-based Graphing Solution |
+-------------------------------------------------------------------------+
| This code is designed, written, and maintained by the Cacti Group. See |
| about.php and/or the AUTHORS file for specific developer information. |
+-------------------------------------------------------------------------+
| http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
define('REGEXP_SNMP_TRIM', '/(hex|counter(32|64)|gauge|gauge(32|64)|float|ipaddress|string|integer):|(up|down)\(|\)$/i');
define('SNMP_METHOD_PHP', 1);
define('SNMP_METHOD_BINARY', 2);
if (!defined('SNMP_STRING_OUTPUT_GUESS')) {
define('SNMP_STRING_OUTPUT_GUESS', 1);
}
if (!defined('SNMP_STRING_OUTPUT_ASCII')) {
define('SNMP_STRING_OUTPUT_ASCII', 2);
}
if (!defined('SNMP_STRING_OUTPUT_HEX')) {
define('SNMP_STRING_OUTPUT_HEX', 3);
}
global $banned_snmp_strings;
$banned_snmp_strings = array('End of MIB', 'No Such', 'No more');
if (!class_exists('SNMP')) {
include_once($config['include_path'] . '/phpsnmp/classSNMP.php');
}
function cacti_snmp_session($hostname, $community, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context, $engineid,
$port = 161, $timeout = 500, $retries = 0, $max_oids = 10) {
switch ($version) {
case '1':
$version = SNMP::VERSION_1;
break;
case '2':
$version = SNMP::VERSION_2c;
break;
case '3':
$version = SNMP::VERSION_3;
break;
}
try {
$session = new SNMP($version, $hostname . ':' . $port, ($version == 3 ? $username : $community), $timeout * 1000, $retries);
} catch (Exception $e) {
return false;
}
if (defined('SNMP_OID_OUTPUT_NUMERIC')) {
$session->oid_output_format = SNMP_OID_OUTPUT_NUMERIC;
$session->valueretrieval = SNMP_VALUE_LIBRARY;
}
$session->max_oids = $max_oids;
if (read_config_option('oid_increasing_check_disable') == 'on') {
$session->oid_increasing_check = false;
}
if ($version != SNMP::VERSION_3) {
return $session;
}
if ($priv_proto == '[None]') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
try {
$session->setSecurity($sec_level, $auth_proto, $password, $priv_proto, $priv_pass, $context, $engineid);
} catch (Exception $e) {
return false;
}
return $session;
}
function cacti_snmp_get($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context,
$port = 161, $timeout = 500, $retries = 0, $environ = SNMP_POLLER,
$engineid = '', $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
global $config, $snmp_error;
$max_oids = 1;
if (!cacti_snmp_options_sanitize($version, $community, $port, $timeout, $retries, $max_oids)) {
return 'U';
}
if (snmp_get_method('get', $version, $context, $engineid, $value_output_format) == SNMP_METHOD_PHP) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
snmp_set_quick_print(0);
if (function_exists('snmp_set_enum_print')) {
snmp_set_enum_print(true);
}
if ($version == '1') {
$snmp_value = snmpget($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} elseif ($version == '2') {
$snmp_value = snmp2_get($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} else {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
$snmp_value = snmp3_get($hostname . ':' . $port, $username, $sec_level, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($snmp_value === false) {
cacti_log("WARNING: SNMP Error:'$snmp_error', Device:'$hostname', OID:'$oid'", false);
$snmp_value = 'U';
} else {
$snmp_value = format_snmp_string($snmp_value, false, $value_output_format);
}
} else {
$snmp_value = '';
/* net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
} elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
} elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
} else {
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
} else {
$context = '';
}
if (strlen($engineid)) {
$engineid = '-e ' . snmp_escape_string($engineid);
} else {
$engineid = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($sec_level) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context .
' ' . $engineid);
}
/* no valid snmp version has been set, get out */
if (empty($snmp_auth)) { return; }
exec(cacti_escapeshellcmd(read_config_option('path_snmpget')) .
' -O fntevU' . ($value_output_format == SNMP_STRING_OUTPUT_HEX ? 'x ':' ') . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid), $snmp_value);
/* fix for multi-line snmp output */
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
if (substr_count($snmp_value, 'Timeout:')) {
cacti_log("WARNING: SNMP Error:'Timeout', Device:'$hostname', OID:'$oid'", false);
$snmp_value = 'U';
} else {
$snmp_value = format_snmp_string($snmp_value, false, $value_output_format);
}
}
return $snmp_value;
}
function cacti_snmp_get_raw($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context,
$port = 161, $timeout = 500, $retries = 0, $environ = SNMP_POLLER,
$engineid = '', $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
global $config, $snmp_error;
$max_oids = 1;
if (!cacti_snmp_options_sanitize($version, $community, $port, $timeout, $retries, $max_oids)) {
return 'U';
}
if (snmp_get_method('get', $version, $context, $engineid, $value_output_format) == SNMP_METHOD_PHP) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
snmp_set_quick_print(0);
if (function_exists('snmp_set_enum_print')) {
snmp_set_enum_print(true);
}
if ($version == '1') {
$snmp_value = snmpget($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} elseif ($version == '2') {
$snmp_value = snmp2_get($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} else {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
$snmp_value = snmp3_get($hostname . ':' . $port, $username, $sec_level, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($snmp_value === false) {
cacti_log("WARNING: SNMP Error:'$snmp_error', Device:'$hostname', OID:'$oid'", false);
$snmp_value = 'U';
}
} else {
$snmp_value = '';
/* net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
} elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
} elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
} else {
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
} else {
$context = '';
}
if (strlen($engineid)) {
$engineid = '-e ' . snmp_escape_string($engineid);
} else {
$engineid = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($sec_level) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context .
' ' . $engineid);
}
/* no valid snmp version has been set, get out */
if (empty($snmp_auth)) { return; }
exec(cacti_escapeshellcmd(read_config_option('path_snmpget')) .
' -O fntev' . ($value_output_format == SNMP_STRING_OUTPUT_HEX ? 'x ':' ') . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid), $snmp_value);
/* fix for multi-line snmp output */
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
if (substr_count($snmp_value, 'Timeout:')) {
cacti_log("WARNING: SNMP Error:'Timeout', Device:'$hostname', OID:'$oid'", false);
$snmp_value = 'U';
}
}
return $snmp_value;
}
function cacti_snmp_getnext($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context,
$port = 161, $timeout = 500, $retries = 0, $environ = SNMP_POLLER,
$engineid = '', $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
global $config, $snmp_error;
$max_oids = 1;
if (!cacti_snmp_options_sanitize($version, $community, $port, $timeout, $retries, $max_oids)) {
return 'U';
}
if (snmp_get_method('getnext', $version, $context, $engineid, $value_output_format) == SNMP_METHOD_PHP) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
snmp_set_quick_print(0);
if ($version == '1') {
$snmp_value = snmpgetnext($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} elseif ($version == '2') {
$snmp_value = snmp2_getnext($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} else {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
$snmp_value = snmp3_getnext($hostname . ':' . $port, $username, $sec_level, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($snmp_value === false) {
cacti_log("WARNING: SNMP Error:'$snmp_error', Device:'$hostname', OID:'$oid'", false);
$snmp_value = 'U';
} else {
$snmp_value = format_snmp_string($snmp_value, false, $value_output_format);
}
} else {
$snmp_value = '';
/* net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
} elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
} elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
} else {
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
} else {
$context = '';
}
if (strlen($engineid)) {
$engineid = '-e ' . snmp_escape_string($engineid);
} else {
$engineid = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($sec_level) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context .
' ' . $engineid);
}
/* no valid snmp version has been set, get out */
if (empty($snmp_auth)) {
return;
}
exec(cacti_escapeshellcmd(read_config_option('path_snmpgetnext')) .
' -O fntevU' . ($value_output_format == SNMP_STRING_OUTPUT_HEX ? 'x ':' ') . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid), $snmp_value);
/* fix for multi-line snmp output */
if (is_array($snmp_value)) {
$snmp_value = implode(' ', $snmp_value);
}
if (substr_count($snmp_value, 'Timeout:')) {
cacti_log("WARNING: SNMP Error:'Timeout', Device:'$hostname', OID:'$oid'", false);
}
/* strip out non-snmp data */
$snmp_value = format_snmp_string($snmp_value, false, $value_output_format);
}
return $snmp_value;
}
function cacti_snmp_session_walk($session, $oid, $dummy = false, $max_repetitions = NULL,
$non_repeaters = NULL, $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
$session->value_output_format = $value_output_format;
if ($non_repeaters === NULL)
$non_repeaters = 0;
if ($max_repetitions === NULL)
$max_repetitions = $session->max_oids;
if ($max_repetitions <= 0)
$max_repetitions = 10;
try {
$out = $session->walk($oid, false, $max_repetitions, $non_repeaters);
} catch (Exception $e) {
$out = false;
}
if ($out === false) {
if ($oid == '.1.3.6.1.2.1.47.1.1.1.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.68.1.2.2.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.5' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.14' ||
$oid == '.1.3.6.1.4.1.9.9.23.1.2.1.1.6') {
/* do nothing */
} elseif ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP Error:\'Timeout (' . ($info['timeout']/1000) . " ms)', Device:'" . $info['hostname'] . "', OID:'$oid'", false);
}
return array();
}
if (sizeof($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, false, $value_output_format);
}
}
return $out;
}
function cacti_snmp_session_get($session, $oid) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
try {
$out = $session->get($oid);
} catch (Exception $e) {
$out = false;
}
if (is_array($oid)) {
$oid = implode(',', $oid);
}
if ($out === false) {
if ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP Error:\'Timeout (' . ($info['timeout']/1000) . " ms)', Device:'" . $info['hostname'] . "', OID:'$oid'", false);
}
return false;
}
if (is_array($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, false);
}
} else {
$out = format_snmp_string($out, false);
}
return $out;
}
function cacti_snmp_session_getnext($session, $oid) {
$info = $session->info;
if (is_array($oid) && sizeof($oid) == 0) {
cacti_log('Empty OID!', false);
return array();
}
try {
$out = $session->getnext($oid);
} catch (Exception $e) {
$out = false;
}
if (is_array($oid)) {
$oid = implode(',', $oid);
} elseif ($out === false) {
if ($session->getErrno() == SNMP::ERRNO_TIMEOUT) {
cacti_log('WARNING: SNMP Error:\'Timeout (' . ($info['timeout']/1000) . " ms)', Device:'" . $info['hostname'] . "', OID:'$oid'", false);
}
return false;
}
if (is_array($out)) {
foreach($out as $oid => $value){
$out[$oid] = format_snmp_string($value, false);
}
} else {
$out = format_snmp_string($out, false);
}
return $out;
}
function cacti_snmp_walk($hostname, $community, $oid, $version, $username, $password,
$auth_proto, $priv_pass, $priv_proto, $context,
$port = 161, $timeout = 500, $retries = 0, $max_oids = 10, $environ = SNMP_POLLER,
$engineid = '', $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
global $config, $banned_snmp_strings, $snmp_error;
$snmp_oid_included = true;
$snmp_auth = '';
$snmp_array = array();
$temp_array = array();
if (!cacti_snmp_options_sanitize($version, $community, $port, $timeout, $retries, $max_oids)) {
return array();
}
$path_snmpbulkwalk = read_config_option('path_snmpbulkwalk');
if (snmp_get_method('walk', $version, $context, $engineid, $value_output_format) == SNMP_METHOD_PHP) {
/* make sure snmp* is verbose so we can see what types of data
we are getting back */
/* force php to return numeric oid's */
cacti_oid_numeric_format();
if (function_exists('snmprealwalk')) {
$snmp_oid_included = false;
}
snmp_set_quick_print(0);
if ($version == '1') {
$temp_array = snmprealwalk($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} elseif ($version == 2) {
$temp_array = snmp2_real_walk($hostname . ':' . $port, $community, $oid, ($timeout * 1000), $retries);
} else {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
$temp_array = snmp3_real_walk($hostname . ':' . $port, $username, $sec_level, $auth_proto, $password, $priv_proto, $priv_pass, $oid, ($timeout * 1000), $retries);
}
if ($temp_array === false) {
if ($temp_array === false) {
cacti_log("WARNING: SNMP Error:'$snmp_error', Device:'$hostname', OID:'$oid'", false);
} elseif ($oid == '.1.3.6.1.2.1.47.1.1.1.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.68.1.2.2.1.2' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.5' ||
$oid == '.1.3.6.1.4.1.9.9.46.1.6.1.1.14' ||
$oid == '.1.3.6.1.4.1.9.9.23.1.2.1.1.6') {
/* do nothing */
} else {
cacti_log("WARNING: SNMP Error, Device:'$hostname', OID:'$oid'", false);
}
}
/* check for bad entries */
if ($temp_array !== false && sizeof($temp_array)) {
foreach($temp_array as $key => $value) {
foreach($banned_snmp_strings as $item) {
if (strstr($value, $item) != '') {
unset($temp_array[$key]);
continue 2;
}
}
}
$o = 0;
for (reset($temp_array); $i = key($temp_array); next($temp_array)) {
if ($temp_array[$i] != 'NULL') {
$snmp_array[$o]['oid'] = preg_replace('/^\./', '', $i);
$snmp_array[$o]['value'] = format_snmp_string($temp_array[$i], $snmp_oid_included, $value_output_format);
}
$o++;
}
}
} else {
/* ucd/net snmp want the timeout in seconds */
$timeout = ceil($timeout / 1000);
if ($version == '1') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
} elseif ($version == '2') {
$snmp_auth = '-c ' . snmp_escape_string($community); /* v1/v2 - community string */
$version = '2c'; /* ucd/net snmp prefers this over '2' */
} elseif ($version == '3') {
if ($priv_proto == '[None]' || $priv_pass == '') {
$sec_level = 'authNoPriv';
$priv_proto = '';
} else {
$sec_level = 'authPriv';
}
if (strlen($priv_pass)) {
$priv_pass = '-X ' . snmp_escape_string($priv_pass) . ' -x ' . snmp_escape_string($priv_proto);
} else {
$priv_pass = '';
}
if (strlen($context)) {
$context = '-n ' . snmp_escape_string($context);
} else {
$context = '';
}
if (strlen($engineid)) {
$engineid = '-e ' . snmp_escape_string($engineid);
} else {
$engineid = '';
}
$snmp_auth = trim('-u ' . snmp_escape_string($username) .
' -l ' . snmp_escape_string($sec_level) .
' -a ' . snmp_escape_string($auth_proto) .
' -A ' . snmp_escape_string($password) .
' ' . $priv_pass .
' ' . $context .
' ' . $engineid);
}
if (read_config_option('oid_increasing_check_disable') == 'on') {
$oidCheck = '-Cc';
} else {
$oidCheck = '';
}
if (file_exists($path_snmpbulkwalk) && ($version > 1) && ($max_oids > 1)) {
$temp_array = exec_into_array(cacti_escapeshellcmd($path_snmpbulkwalk) .
' -O QnU' . ($value_output_format == SNMP_STRING_OUTPUT_HEX ? 'x ':' ') . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' -Cr' . $max_oids .
' ' . $oidCheck . ' ' .
cacti_escapeshellarg($hostname) . ':' . $port . ' ' .
cacti_escapeshellarg($oid));
} else {
$temp_array = exec_into_array(cacti_escapeshellcmd(read_config_option('path_snmpwalk')) .
' -O QnU ' . ($value_output_format == SNMP_STRING_OUTPUT_HEX ? 'x ':' ') . $snmp_auth .
' -v ' . $version .
' -t ' . $timeout .
' -r ' . $retries .
' ' . $oidCheck . ' ' .
' ' . cacti_escapeshellarg($hostname) . ':' . $port .
' ' . cacti_escapeshellarg($oid));
}
if (substr_count(implode(' ', $temp_array), 'Timeout:')) {
cacti_log("WARNING: SNMP Error:'Timeout', Device:'$hostname', OID:'$oid'", false);
}
/* check for bad entries */
if (is_array($temp_array) && sizeof($temp_array)) {
foreach($temp_array as $key => $value) {
foreach($banned_snmp_strings as $item) {
if (strstr($value, $item) != '') {
unset($temp_array[$key]);
continue 2;
}
}
}
$i = 0;
foreach($temp_array as $index => $value) {
if (preg_match('/(.*) =.*/', $value)) {
$snmp_array[$i]['oid'] = trim(preg_replace('/(.*) =.*/', "\\1", $value));
$snmp_array[$i]['value'] = format_snmp_string($value, true, $value_output_format);
$i++;
} else {
$snmp_array[$i-1]['value'] .= $value;
}
}
}
}
return $snmp_array;
}
function format_snmp_string($string, $snmp_oid_included, $value_output_format = SNMP_STRING_OUTPUT_GUESS) {
global $banned_snmp_strings;
$string = preg_replace(REGEXP_SNMP_TRIM, '', trim($string));
if ($snmp_oid_included) {
/* strip off all leading junk (the oid and stuff) */
$string_array = explode('=', $string);
if (sizeof($string_array) == 1) {
/* trim excess first */
$string = trim($string);
} elseif ((substr($string, 0, 1) == '.') || (strpos($string, '::') !== false)) {
/* drop the OID from the array */
array_shift($string_array);
$string = trim(implode('=', $string_array));
} else {
$string = trim(implode('=', $string_array));
}
} else {
$string = trim($string);
}
/* return the easiest value */
if ($string == '') {
return $string;
}
/* now check for the second most obvious */
if (is_numeric($string)) {
return $string;
}
/* remove ALL quotes, and other special delimiters */
$string = str_replace(array('"', "'", '>', '<', "\\", "\n", "\r"), '', $string);
/* account for invalid MIB files */
if (strpos($string, 'Wrong Type') !== false) {
$string = strrev($string);
if ($position = strpos($string, ':')) {
$string = trim(strrev(substr($string, 0, $position)));
} else {
$string = trim(strrev($string));
}
}
/* Remove invalid chars, if the string output is to be numeric */
if ($value_output_format == SNMP_STRING_OUTPUT_GUESS) {
$k = strlen($string);
for ($i=0; $i < $k; $i++) {
if ((ord($string[$i]) <= 31) || (ord($string[$i]) >= 127)) {
$string[$i] = ' ';
}
}
}
/* Trim the string of trailing and leading spaces */
$string = trim($string);
/* convert hex strings to numeric values */
if (is_hex_string($string) && $value_output_format == SNMP_VALUE_NUMERIC) {
$output = '';
$parts = explode(' ', $string);
/* convert the hex string into an ascii string */
foreach($parts as $part) {
$output .= chr(hexdec($part));
}
if (is_numeric($output)) {
$string = number_format($output, 0, '', '');
} else {
$string = $output;
}
} elseif (preg_match('/hex-/i', $string)) {
$output = '';
/* strip off the 'Hex-STRING:' */
$string = preg_replace('/hex- ?/i', '', $string);
/* normalize some forms */
$string = str_replace(array(' ', '-', '.'), ':', $string);
$parts = explode(':', $string);
if (is_mac_address($string)) {
$mac = true;
} else {
$mac = false;
}
/* convert the hex string into an ascii string */
foreach($parts as $part) {
if ($mac == false) {
$output .= ($output != '' ? ':' : '');
if ($part == '00') {
$output .= '00';
} else {
$output .= str_pad($part, 2, '0', STR_PAD_LEFT);
}
} else {
$output .= ($output != '' ? ':' : '') . $part;
}
}
if (is_numeric($output)) {
$string = number_format($output, 0, '', '');
} else {
$string = $output;
}
} elseif (preg_match('/(hex:\?)?([a-fA-F0-9]{1,2}(:|\s)){5}/i', $string)) {
$octet = '';
/* strip off the 'hex:' */
$string = preg_replace('/hex: ?/i', '', $string);
/* split the hex on the delimiter */
$octets = preg_split('/\s|:/', $string);
/* loop through each octet and format it accordingly */
for ($i=0;($i<count($octets));$i++) {
$octet .= str_pad($octets[$i], 2, '0', STR_PAD_LEFT);
if (($i+1) < count($octets)) {
$octet .= ':';
}
}
/* copy the final result and make it upper case */
$string = strtoupper($octet);
} elseif (preg_match('/Timeticks:\s\((\d+)\)\s/', $string, $matches)) {
$string = $matches[1];
}
foreach($banned_snmp_strings as $item) {
if (strpos($string, $item) !== false) {
$string = '';
break;
}
}
return $string;
}
function snmp_escape_string($string) {
global $config;
if (! defined('SNMP_ESCAPE_CHARACTER')) {
if ($config['cacti_server_os'] == 'win32') {
define('SNMP_ESCAPE_CHARACTER', '"');
} else {
define('SNMP_ESCAPE_CHARACTER', "'");
}
}
if (substr_count($string, SNMP_ESCAPE_CHARACTER)) {
$string = substr_replace(SNMP_ESCAPE_CHARACTER, "\\" . SNMP_ESCAPE_CHARACTER, $string);
}
return SNMP_ESCAPE_CHARACTER . $string . SNMP_ESCAPE_CHARACTER;
}
function snmp_get_method($type = 'walk', $version = 1, $context = '', $engineid = '',
$value_output_format = SNMP_STRING_OUTPUT_GUESS) {
if ($value_output_format == SNMP_STRING_OUTPUT_HEX) {
return SNMP_METHOD_BINARY;
} elseif ($version == 3 && $context != '') {
return SNMP_METHOD_BINARY;
} elseif ($version == 3 && $engineid != '') {
return SNMP_METHOD_BINARY;
} elseif ($type == 'walk' && file_exists('path_snmpbulkwalk')) {
return SNMP_METHOD_BINARY;
} elseif (function_exists('snmpget') && $version == 1) {
return SNMP_METHOD_PHP;
} elseif (function_exists('snmp2_get') && $version == 2) {
return SNMP_METHOD_PHP;
} elseif (function_exists('snmp3_get') && $version == 3) {
return SNMP_METHOD_PHP;
} else {
return SNMP_METHOD_BINARY;
}
}
function cacti_snmp_options_sanitize($version, $community, &$port, &$timeout, &$retries, &$max_oids) {
/* determine default retries */
if (($retries == 0) || (!is_numeric($retries))) {
$retries = read_config_option('snmp_retries');
if ($retries == '') $retries = 3;
}
/* determine default max_oids */
if (($max_oids == 0) || (!is_numeric($max_oids))) {
$max_oids = read_config_option('max_get_size');
if ($max_oids == '') $max_oids = 10;
}
/* do not attempt to poll invalid combinations */
if (($version == 0) || (!is_numeric($version)) ||
(!is_numeric($max_oids)) ||
(!is_numeric($port)) ||
(!is_numeric($retries)) ||
(!is_numeric($timeout)) ||
(($community == '') && ($version != 3))
) {
return false;
}
return true;
}
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